Tetra Tech International Development pursues clear solutions to international development's most complex problems.  

From creating sustainable urban development solutions to supporting governance and security reforms to unlocking infrastructure finance, we work with global and local partners, designing, delivering and evaluating programmes that improve lives and economies

Our Projects
We work on projects that tackle the root causes of global inequality and make tangible progress towards the Sustainable Development Goals.

Our teams design and deliver projects in the areas of governance, security and justice, economic growth and infrastructure. 

Our in-house evaluation and research experts measure the effectiveness of development aid throughout the world and equip organisations and our programmes with high quality, tailored monitoring and evaluation systems. 

Where we work
From our offices in the UK, Poland, the Netherlands, Croatia and Turkey, we oversee more than 120 currently live projects in 52 countries.
Working with our regional offices and partners, we develop solutions that are effective and sustainable for local contexts. 
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We are part of the Tetra Tech family, a leading provider of consulting and engineering work across the globe.

Tetra Tech works with government and commercial clients to develop innovative solutions in the fields of international development,  water, environment, infrastructure, resource management and energy. With 20,000-strong team worldwide, Tetra Tech's capabilities span the entire project life cycle.

An unprecedented year

Find out more about how we are working with our teams, beneficiaries and clients to respond safely and productively to the global COVID-19 pandemic.

Our new identity
Uniting as Tetra Tech

Read about Coffey and WYG's unification as Tetra Tech International Development in 2020, in the word of our Managing Director, Ben Ward.